What are the main factors we consider when rating the best betting sites? They are consistently running promotions for every major sport and events throughout the year and are very generous when it comes to odds. They have one of the easiest experiences overall when using their site and you will have access to any sport you can think of as you scroll through their extensive list. BetMGM was one of the first companies to establish an online presence, and they’ve continued to upgrade and maintain as one of the better sites to use.